Prepare Unit Ventilator(S) For Start-Up; Oiling The Fan Shaft End Bearing; Unit Ventilator Start-Up - Daikin AVV Installation And Maintenance Manual

Prepare Unit Ventilator(s) for
Start-up
Remove Battery Shipping Tab
Check that board backup battery shipping tab is
removed. To remove, grasp tab and gently pull. Battery
should be replaced every 3 years of unit service.
Remove Battery ShippingTab

Oiling the Fan Shaft End Bearing:

CAUTION
Do not attempt to operate the unit fans until the fan bearings have
been oiled. Oiled bearings provide smooth, and quiet operation of
the fan system.
See Figure 133 for oiling point. Access to fan shaft
bearing is through left top access door (750, 1000, 1250
cfm units only). Lift the oiler cap. Oil, using a few drops of
high grade SAE 20 or 30 nondetergent oil. Oil the bearing
every 6-12 months to maintain proper lubrication.
NOTICE
G.E. motor manufacturer recommends not oiling the fan motor.
Figure 133: Oiling Point
Access To Fan Shaft Bearing Through Left Top Access Door
NOTICE
For 1500 cfm units, access to the fan shaft bearing is through the
center front panel. It is located between the third and fourth fan
housing from the right (Figure
IM 817-7
Bearing Oiler Cap
134).
Figure 134: Oiling Point for 1500 cfm units
Bearing Oiler Cap

Unit Ventilator Start-up

NOTICE
Remove debris, dust, dirt, and any obstruction from the area in
front of the return air intake grille at the floor as this will affect unit
performance. If a draftstop system has been installed be sure that
all draftstop intake grilles are unobstructed.
1 . Before proceeding inspect the fan system, ensure all parts
are aligned properly and move freely. Inspect fans and
fan discharge area for obstructions. Rotate fan manually.
Check that a clean filter is installed and area in front of unit
ventilator is free of debris (see
All panels should be in place and properly fastened. Check
for outdoor air leaks and condensation. Ensure the coil
section is properly sealed using the insulating foam donuts
supplied.
2 . After the unit ventilator has been properly installed, activate
unit electrical power and applicable chilled water/hot water/
steam/refrigerant systems.
3 . Using the applicable control, activate the unit ventilator.
Depending on the operating mode selected, the dampers,
fans, and other components should operate as needed.
4 . Run the unit ventilator for ten minutes, listening and
observing. Fans should be operating correctly, and rotating
in the proper direction, without unusual noise. Likewise, the
unit should be free of sheet metal rattles and / or unusual
noises. All panels should be in place and properly fastened,
and checked for air leaks and condensation.
72
Figure 124 on page 67).
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